Face mask



FIG. 1 is a front elevational view of a face mask showing our new design, the rear elevational view being identical thereof;

FIG. 2 is a top plan view, the bottom plan view being identical thereof;

FIG. 3 is a left side elevational view, the right side elevational view being identical thereof; and

FIG. 4 is a front perspective view, the broken lines being for illustrative purposes only. 

The ornamental design for a face mask, substantially as shown and described. 